Alert archive / Iowa / Severe Thunderstorm Warnings in 2019
Severe Thunderstorm Warning 169, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Sep 24, 2019, 7:14 PM CDT for Buena Vista County, Cherokee County, Iowa. It was in force for 46 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Sep 24, 2019, 7:14 PM CDT (00:14 UTC)
- Expired
- Sep 24, 2019, 8:00 PM CDT
- In force
- 46 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 1.5 in
- Wind
- 60.0 mph
Counties Buena Vista County, IA, Cherokee County, IA
The radar
The Sioux Falls radar (KFSD), 144 km from the middle of the area, began a volume at 00:17 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Sep 24, 4:43 PM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 0.2 hours before the alert went out and 177 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 2127 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 1002 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 173 m²/s²
- Significant tornado parameter
- 2.0
- Supercell composite
- 16.5
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Sioux Falls, SD wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 24, 6:44 PM CDT, 30 minutes earlier.
Area forecast discussion, Sep 24, 6:44 PM CDT, 30 minutes before
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</html>Hazardous weather outlook, Sep 24, 3:52 AM CDT, 15 hours 22 minutes before
Hazardous Weather Outlook National Weather Service Sioux Falls SD 352 AM CDT Tue Sep 24 2019 MNZ071-SDZ038>040-050-052>066-068>070-250900- Lincoln-Beadle-Kingsbury-Brookings-Gregory-Jerauld-Sanborn-Miner- Lake-Moody-Brule-Aurora-Davison-Hanson-McCook-Minnehaha-Charles Mix- Douglas-Hutchinson-Turner-Bon Homme-Yankton-Clay- 352 AM CDT Tue Sep 24 2019 This Hazardous Weather Outlook is for southwest Minnesota, central South Dakota, east central South Dakota, south central South Dakota and southeast South Dakota. .DAY ONE...Today and tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Periods of showers and thunderstorms return by later this weekend and early next week, although details regarding any severe weather and heavy rain risk remain uncertain. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. IAZ001>003-012>014-020>022-031-032-MNZ072-080-081-089-090-097-098- NEZ013-014-SDZ067-071-250900- Lyon-Osceola-Dickinson-Sioux-O'Brien-Clay-Plymouth-Cherokee- Buena Vista-Woodbury-Ida-Murray-Cottonwood-Nobles-Jackson-Pipestone- Rock-Dixon-Dakota-Lincoln-Union- 352 AM CDT Tue Sep 24 2019 This Hazardous Weather Outlook is for northwest Iowa, west central Iowa, southwest Minnesota, northeast Nebraska and southeast South Dakota. .DAY ONE...Today and tonight. Scattered thunderstorms are expected to develop along a cold front by late afternoon and early evening, particularly near and southeast of a Sioux City to Spencer line. A few of these storms may be strong to severe with large hail up to tennis ball size the primary risk. A secondary risk of damaging wind and an isolated tornado also cannot be ruled out. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Periods of showers and thunderstorms return by later this weekend and early next week, although details regarding any severe weather and heavy rain risk remain uncertain. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed between 4 and 8 pm today.
In the hours before
Local storm report, Sep 24, 5:50 PM CDT, 1 hour 24 minutes before
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</html>Local storm report, Sep 24, 5:52 PM CDT, 1 hour 22 minutes before
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</html>Local storm report, Sep 24, 5:58 PM CDT, 1 hour 16 minutes before
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</html>Local storm report, Sep 24, 6:08 PM CDT, 1 hour 6 minutes before
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</html>Local storm report, Sep 24, 6:11 PM CDT, 1 hour 3 minutes before
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</html>Local storm report, Sep 24, 6:12 PM CDT, 1 hour 2 minutes before
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</html>Nearby
Severe Thunderstorm Warnings in Iowa, 2019Every severe thunderstorm warning in 2019
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.